Powdering machine



May 18, 1926. 1,584,956

S. LIPSIUSI Pbwmmme MACHINE Filed April 10. 1924', 4 Sheets-Sheet 1INVENTOR POWDERING MACHINE Filed April 1924 4 Sheets-Sheet 2 May 18',1926. 1,584,956

s. LlPSlUS' I POWDERING MACHINE Filed April 10, 1924 4 Sheets-Sheet 5May 18 1926.

L I I l l I I I I I s. LlPslus POWDERING MACHINE Filed April 10, 1924 4Sheets-Sheet 4 Patented May 18, 1926.

hi hi i T ear/mar nrrsrns, or new roan, N. Y.

POWDERINC': MAGItE-INE.

Application filed April 10, 1924.

The main object of my invention is to provide a simple an reliablemechanism for applying powder to sheets of paper, etc, for instance, inthe art of raised printing. In this type of work the pattern, design, orwording is printed on the paper ,or other material with aspecial ink orother composition, which remains somewhat tacky for a short time. Whilethe composition is tacky, powder is applied, which is subsequently fusedto provide the permanent raised effect. I have sought to providemechanism for automatically handling the sheets of paper or thelike,,applying powder to the sheet, removing the excess powder fromthose portions of. the sheet to which it is not desired to adhere, andthen delivering the sheet to be dried, or baked, as the case may be. Oneobject of the invention is to produce neat and uniform effects withoutwasting powder. Another object is to prevent the, wasteful andunpleasant scattering of the powder. Another object is to provide asimple and inexpensive powdering'machine which can be usedwith anordinaryprinting pressso as to receive the sheets automatically as theyare delivered from the printing press, apply the powder, and feed thesheets rapidly to the baking machine, or oven. Another object is toconstruct the powdering machine so that it can be readily adapted toco-operate with the printing press, or disconnected readily from thepress so that the printing press can be used independently of thepowdeiing machine.

Another object is to provide a construction which will facilitate thehandling of sheets of different sizes as they come from the printingpress Without danger of turning them over.

Another object is to insure the uniform passage 'of the sheets throughthe powdering machine without having the sheets interfere with eachother or becoming clogged, in the machine. Y f

' In carrying out my invention I provide a special type of drum, orrevolfvablc casing, through which the sheets are fed and by means ofwhich the powder is applied. The sheets are fed through this drum byaconveyor consisting of a series of sections of as the drum rotates. Oneend of this conwire mesh,- or belts, operated automatically Serial No.705,415.

readily connected to or associated withthe delivery bed of a more orless standard type of printing press.

' Figure 1 is a plan view and partial horizontal section of a machineembodying improvements of my invention.

Figure 2 is a side view ofthe same, showing a part of the conveyor insection as associated with the delivery .of a Miller feeder on anordinary printing press.

Figure 3 is a side view and partial longitudlinal section view on asomewhat larger sca e.

Figure -i is a plan view and partial section i on the general plane ofthe line ll of Figure 2, showing the driving motors and shafts andconnected belts or chains.

Figure 5 is a vertical transverse sectional view on the plane of theline 5-5 of the Figure 2.

The drum is preferably of sheet metal and suitably supported, forinstance, by pairs-of rollers, 11'11, at one end and 12'12 at the otherend. The drum is also preferably supported intermediate of its ends by asort of guide pully 13 which is driven by a motor 14. The opposite endsof the drum. are tapered or conical with a channel or gutter 15intermediate their large ends. This gutter is provided with a series ofsmall partitions or buckets 16 adapted to pick up and carry around thepowder which is placed in the gutter. These buckets may be of anysuitable size or number. They may be made in one strip and removable, ifdesired, so that, a greater or less number of buckets may be" used forany particular type of work that may be required. I also prefer toprovide a tapered'hopper or guiding chute 17 extending across the drumabove the sheets so as to confine the powder as it is dropped from theascending and descending buckets.

The conveyor consists of'a series of sec tions 20, 21, 22, and23,constructed and arranged so as to, properly receive and transport thesheets of paper or other stock which is to be powdered. These differentsections or portions of the conveyor are all preferably driven atuniform speed by somesuitable motor, 24 with chains, belts, or cords,and pulle s, which engage the shafts 25, 26 and 2 for driving theconveyor 20; shaft 28 for driving conveyor 21; shaft 29 for. drivingpulley and shaft 80 and conveyor 22. So far as the powderingmech anismper se is concerneditwould he under stood that the printed or preparedsheets might be deposited directly upon conveyor or upon conveyor 21 byhand or in any other way. For high speed and economical operation,however, I prefer to adapt the mechanism to be associated directly witha printing press so as to avoid the necessity of any intermediatehandling and loss of time. This also makes it possible to use a morequickly drying ink without losing the effective stickiness required forproper adhesion of the powder. 32 indicates a fragment of the bed ordelivery plate of an ordinary printing press, and 33 represents theoscillating arm with the proper grasping jaws ill for handling the stocksheet In the form shown, the arms 36 which support the conveyor 20 arebent at an angle at their receiving ends so as to correspond with theshape of the delivery bed of the printing press, and intermediate guidesor rolls 37 are provided for the conveyor so as to give this end of theconveyor an inclined or angular disposition to accommodate the naturalfalling angle of the printing sheet 35. I also provide an angular stop38 adapted to serve as an abutment for the lower edge of the sheet as itis doposited so as to prevent that edge from touching the conveyorbefore the upper edge of the sheet 35 strikes the conveyor. If the loweredge of the sheet were allowed to touch the conveyor before the upperedge of the sheet, the conveyor would be likely to turn the sheet overand thus spoil the work. To bring the abutment 38 into the properposition for the particular sheet which is being handled, I provide someconvenient, form of adjustment device, such as adjustable screws 39. Ialso provide a stop 40 which extends across the conveyor adapted toserve as an abutment to prevent the sheet 35 from sailing too farforward and thus being displaced on the conveyor. The arms 36 arepreferably hinged about the axis of the shaft 27 so as to permit theconveyor 20 to be tilted up out of the way of the printing press. I havefound that conveyor 20 operates much more satisfactorily if its bearingsurface is of cloth or similar matcrial, such as canvas, to which thepaper more satisfactorily adheres as it is deposited upon the inclinedreceiving end at the press.

Beneath the entrance and exit ends of the conveyor, I preferably providestationaryguides 42 and 43 respectively, for collecting any powder whichmay have escaped from the opposite ends of the powderin drum, andre-depositing this powder int; the drum where the rotating movementcauses the powder to gradually work down. to the bottom of the gutter,where the lift buckets are located.

As the printed sheets are carried along by the conveyor 20, they passautomatically on to the conveyor 21 upon which they r(' ccive the powderfrom the hopper 17. There conveyors 21 and 22 may conveniently be madeof helically interwoven wires which form very flexible and durable beltsthrough which the escaping powder may readily pass. As the printed sheetleaves the con veyor 21 it rides up the inclined conveyor 22 to which itis held or in a sense geared by the loosely mounted rotating rings -t-tand 45. These feed rings are carried by brackets 46 which are preferablytuljustablc up and down and horizontally so as to tacit itate theirproper location with respect to the conveyor 22 and the sheets thereon.the sheets are conveyed up the incline they are vibrated in somesuitable manner so as to shake off the powder from the unprintedportions of the sheet. This vibration may be conveniently affected bymeans of a plate or sort of hand 47 beneath the conveyor 22 which isoperated by a crank shaft 4 8 driven by the pulley 49. This plate J maybe perforated or constructed in some suitable way so as to permit powderto pass through it and not accumulate upon it. I may als provide anysuitable and well known form of suction device for holding the sheets onthe conveyor 22, if desired, particularly at that portion which is abovethe vibrator ll.

The delivery end of conveyor 22 may be raised or lowered so as to changethe angle of inclination of that conveyor.

It is preferable that those portions of the apparatus which are the mostsubjected to being powdered should be movable as the powder is of such anature that it adheres to anything which is stationary and rapidlycollects, This only wastes the powder, which is quite expensive.

My present invention constitutes in1- provements over the constructionof my former Patents Nos. 1,144,302) and 1,391,783, and such otherconstruction. as I am aware of in features hereinafter set forth in theclaims.

I claim:

1. A. powdering machine comprising a rotating drum having means forlifting powder and a conveyor for carrying printed sheets through saiddrum.

2. A powderlng machine comprising a rotating drum having means forlifting powder and a conveyor for carrying printed sheets through saiddrum, one part of the conveyor being of canvas and inclined forreceiving sheets as delivered from a printing press.

3. A powdering machine compr sing a rotating drum having means forlifting powder and a conveyor for carrying printed sheets through saiddrum, one part of the conveyor being hinged adjacent to the drum.

4.-. A powdering machine compris ng a rotating drum having means forlifting powder and a conveyor for carrying printed sheets through saiddrum, a portion of the conveyor within the drum being upwardly inclinedtoward the discharge end.

5. In a powdering machine, a rotating drum, a conveyor for taking sheetsthrough said drum, and means for vibrating a portion of said'conveyorwithin said drum.

6. In a powdering machine, a drum having an annular gutter With atapered Wall leading to said gutter and a conveyor for taking sheetsthrough said drum.

7. In a powdering machine, a drum hav ing a gutter with Walls tapered inopposite directions from said gutter, and a conveyor for carryingsheet-s through said drum.

8. In a powdering machine, a rotating drum tapered at its opposite endsand having a powder-receiving channel between its tapered ends, aconveyor section for feeding sheets into said drum, and a secondconveyor section for receiving sheets from the first conveyor sectionand delivering them from said drum.

9. In a povvdering machine, a rotating drum tapered at its opposite endsand having a powder-receiving channel between its tapered ends, aconveyor section for feeding sheets into said drum, and a secondconveyor section for receiving sheets from the first conveyor sectionand delivering them from said drum, and means for vibrating the sheetson said latter conveyor section.

10. In a powdering machine, a drum tapered at its opposite ends, aconveyor section for feeding sheets into said drum, and a secondconveyor section for receiving sheets from the first conveyor sectionand delivering them from said drum, and loosely mounted rollers forholding the sheets on said latter conveyor section. I

11. In a powdering machine, a drum tapered at its opposite ends, aconveyor section for feeding sheets into said drum, and a secondconveyor section for receiving sheets from the first conveyor sectionand delivering them from said drum, and stationary guide chutesextending from the outer ends of said conveyors to within the ends ofsaid drum.

12. In a powdering machine, a rotatable drum, a conveyor section forcarrying sheets into said drum, and a second and upwardly inclinedconveyor section for carrying the powdered sheets from the firstconveyor section Within said drum.

13. In a powdering machine, a rotatable drum, a conveyor section forcarrying sheets into said drum, and a second upwardly inclinedconveyorsection for carrying the powdered sheets from the first conveyor sectionWithin said drum, and means for vibrating said inclined conveyorsection.

14. In a powdering machine, a rotatable drum, a conveyor section forcarrying sheets into said drum, and a second upwardly inclined conveyorsection for carrying the powdered sheets from the first conveyor section within said drum, and means for bold ing sheets onto said inclinedconveyor sec- .tion.

15. In a powdering machine, a drum tapered at its opposite ends, aroller engaging said drum to rotate the same, and a conveyor forcarrying sheets through said drum.

16. In a powdering machine, a drum tapered at its opposite ends, aseries of rollers for supporting the opposite ends of said drum, meansengaging the intermediate portion of said drum for rotating same, and aconveyor for carrying sheets through said drum.

17. In a powdering machine a conveyor consisting of a canvas section forreceiving sheets from a printing press anda wire mesh section forreceiving sheets from said canvas section, a rotating drum surrounding apart ofthe wire mesh section of the conveyor for depositing powder onsheets on said conveyor, means for removing excess powder from saidsheets and means for removing the powdered sheets from said drum.

SAMUEL LIPSIUS.

